利用ALT推估變壓器及其銘牌之活化能與可靠度

由於變壓器點檢核對項目眾多，依據點檢時填寫之報表再彙整後之報表項目亦多，不僅現場作業攜帶不便，資料也不易保存及存閱，故台電擬將無線射頻辨識系統置於變壓器外殼以導入點檢之作業程序。變壓器的期望壽命為12年，該期間內無線射頻辨識系統失效將造成該變壓器資料無法審視，因此，在導入階段需於有限時間內，確保其於上述期間內不致失效，故規劃加速壽命試驗評估其可靠度並預估期望壽命。考量變壓器運作時會產生高溫，本研究以三種加嚴的溫度為應力來進行加速壽命試驗；另外，研究產品屬於高可靠度產品，故搭配米勒定律來縮短試驗進行的時間。實驗中，兩個較高應力溫度下產品的期望壽命分別為798及455小時；再以這兩個溫度視為加嚴應力，運用米勒定律得到兩組低應力溫度水準的失效數據，計算出期望壽命分別為1277與1430小時，接著以配適度較高的數據作為本試驗低應力水準的失效數據；最後以阿氏模型計算各個溫度水準的加速因子分別為224、384及634，相對應產品正常使用條件下之受壽命分別為286,516、306,232及288,646小時，與依照文獻所查得的錫銻合金活化能所計算出的產品壽命呈現約42%的差異。

關鍵字

變壓器；無線射頻辨識系統；加速壽命試驗；米勒定律；阿氏模型；活化能

並列摘要

Due to numerous reconciling items and statements after inspecting on transformer.Not only the statements are inconvenient to carry to job site,but also the imformation of the statements are not easy to save and read.As a consequence Taiwan main power intends to use radio frequency identification system placed on transformer outer covering to import inspection of operating procedures. The life expectancy of transformer is 12 years, during which period the radio frequency identification system failure will cause the data of transformer can not be examined.Therefore,it needs to ensure that it will not fail within the said period when imports stage within a limited time.This study plans accelerated life test to assess the reliability and estimate life expectancy.It considers high temperature when transformers operates.Hence,this study uses three strict temperature of accelerated life test.Owing to the research products belong high-reliability products,so it use Miller's law to shorten the trial time.The results show that the temperature of the product under the stress of two higher life expectancy were 798 and 455 hours.Looking on these two temperatures as strict stress,using Miller's law obtains two levels of low temperature stress failure data and calculates the life expectancy are 1277 and 1430 hours, respectively. To choose higher moderate data as a low stress level of failure data.Finally,using Arrhenius’ model to calculate the temperature of each level of acceleration factors were 224,384 and 634.The life time of the products are in the range of 286,516-306232 hours when used in normal conditions. The active energy calculated in this study results in a 42% difference in the products life time compared to that as provide by industry standard MIL-HDBK-217.

並列關鍵字

transformer switch ； radio frequency identification system ； accelerated life test ； Arrhenius model ； active energy

參考文獻

8. 王致達，建構產品活化能估算及可靠度驗證系統－以DOM產品為例，碩士論文，國立台北科技大學，台北，2012。

7. 周一塵，次世代面板框膠之可靠度預估及加速壽命試驗之研究，碩士論文，國立成功大學，台南，2009。

18. 王友隆，利用加速壽命試驗預測DRAM產品於超頻使用環境下之可靠度，碩士論文，國立台北科技大學，台北，2013。

20. J. R. King, Probability Charts for Decision Making Second printing Revised, New Hampshire, 1981.

24. J. H. Kuan, "A Development of Health Care Management System Using System Engineering and RFID Technology," Asia Pacific Conference on Systems Engineering 2012 (APCOSE 2012), Singapore, 2012.

國際替代計量

利用ALT推估變壓器及其銘牌之活化能與可靠度

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